HSS metal drill bit 5 x 86 mm Metal drill bit HSS is a cylindrical drill bit made of HSS 4341 high-speed steel, heat-treated to a hardness of 56 HRC. The drill bit is cross-shaped, the drill point angle is 135 degrees. The spiral is ground. The drill bit is intended for drilling in steel, cast iron, non-ferrous metals, and plastics. Parameters Diameter 5 mm Length 86 mm Working length 52 mm Cylindrical type Set of 2